When innovation Acts for savings... When innovation Acts for savings Exchangers in parallel:

If the drop in pressure on the fumes is too great, it is always possible to put two exchangers in parallel, which will have the effect of dividing the fume flow rate by two. The thermal power recovered then represents twice the power given by the graph. The liquid flow rate to be taken into account is also twice that given by the graph.

For instance: for a flow rate of 6000 Nm³ per hour at 450°C, the GAP 30-3-2 Recuperator/ graph indicates a pressure drop of 2840 Pa, which may be too Technical datasheet high according to your specification. By putting two exchangers in parallel the fumes flow rate under consideration is then 3000 Nm³ Exchanger type : per hour with the result that the pressure drop is 780 Pa. Gas to Compressed air Gas to Liquid Compatible with phase change Recovered thermal power from 50 to 300 kW from 200°C to 700°C Flow range from 250 to 2500 Nm³/h Local pressure resistance up to 16 bars at 250°C

GAP 30-3-2: where the heat exchange surface and external volume are optimised Secondary The GAP 30-3-2 recuperator has been fluid - cold Exchangers in line: designed to answer heat recovery needs for applications that require highly effective exchange If the drop in pressure on the fumes, calculated from the graph, is lower than the within a small volume. The 2 mm space between the GAP-type Recuperator acceptable value for your system, it is then possible to recover more heat by using plates let clean or slighty dusty fumes flow. The GAP Secondary a second exchanger in line with the first one. 30-3-2 has been specially designed to fit within DN300 fluid - hot The pressure drop on the fumes is then double the initial value. In this case, please (12”) chimney ducts. contact us for an estimate of other values.

Primary fluid Fumes WHY THE GAP HEAT RECUPERATORS Notes: The ACTE GAP-type heat recuperators are at the cutting edge of small-size waste heat technology. Thanks to the combination of performance, 1. The graphs shown above give the possibility of drawing up an initial technical validation from the values of reliability and compactness, the GAP-type heat recuperators make waste heat your thermal energy source. Please note that you are welcome to contact us for further technical details. recovery within reach of all industrial processes. Size and weight: the combination of plates and pipes 2. For any sizing where hot gas is used to reheat the air or for generating steam, please contact us directly. Plate exchangers are much smaller and lighter than pipe exchangers. ACTE’s GAP exchangers are manufactured using a clever mix of pipes and plates, allowing a closed volume in which a liquid can flow, providing a much larger surface area for the same length: the doublet. »» Exchange surface of a 1” pipe: 0.08 m² per m ACTE-SA »» Exchange surface of a doublet: 0.8 m² per m Rue Gilles Magnée, 92/1 Thanks to this, GAP recuperators allow energy optimisation on smaller size processes for which casual 4430 Ans solutions are not suitable. Belgium Pressure drops and particles: the benefits from the «gap» between plates Tel : +32 4 247 11 24 The bright idea reagarding the GAP technology is the space offered between each turn of plate. Thanks Fax : +32 4 247 21 87 to this, the fumes path goes easily through the and the heat recovery is made with low [email protected] impact on the industrial process. Heat exchanger overview

Mechanical features: Size and weight: Primary exchange surface: connexion on the Primary side: DN300 Projected surface: 5.87 m² Duct connexion on the Secondary side: DN32 Gap between plates: 2 mm Overall dimensions: Ø323.9 x 840 mm Weight: 50 kg

Technical features: To estimate your recuperator performances, please apply the following steps. First of all, please refer to the column corresponding to the chosen (water or thermal oil).

1. 1500 Nm³/h Then apply the 5-stages procedure below:

1. Trace a vertical straight line through the two graphs corresponding to the available gas (fumes) flow rate. 2. Depending on the temperature of the fumes, read the 2. 127 kW 3.2875 Pa thermal power recovered on the left axis. 3. Read the pressure drop on the gases (fumes) from the grey zone(1) and the right axis.

File:2016_03_03 GAP 30-3-2 Gas to Water.EES 9/03/2016 15:50:31 Page 2 EES Ver. 10.036: #2773: 5-user license, ACTE s.a., Belgium 4. On the bottom graph, read the water flow rate on the left axis from the curve corresponding to the temperature of the Water side pressure drop [Pa] 0 4000 8000 12000 16000 20000 gases (fumes). Fumes @ 300°C 7 Fumes @ 600°C Fumes @ 450°C 5. Read the pressure drop on the water side on the top axis Pressure drop curve 6 5. 5000 Pa from the blue curve (pressure drop).

5 /h] 3 4 Example: 3 Let’s consider the available fumes flow rate is 1500 Nm³ per Water flow rate [m rate flow Water 4. 3.2 m³/h 2 hour and the temperature is 450°C:

1

0 »» The power recovered is therefore 127 kW 0 500 1000 1500 2000 2500 Fumes flow rate [Nm3/h] »» The pressure drop on the fumes is around 2875 Pa »» The corresponding water flow rate is 3.2m³ per hour »» The pressure drop on the water side is 5000 Pa Water with 20% glycol Thermal oil

Pressure Drop Zone on Fumes Pressure Drop Zone on Fumes

File:2016_03_03File:2016_03_03 GAP GAP 30-3-2 30-3-2 Gas Gas to toWater.EES Water.EES 9/03/20169/03/2016 15:50:31 15:50:31 Page Page 2 2 File:2016_02_17File:2016_03_03 GAP GAP 30-3-2 30-3-2 Gas Gas to to oil.EES Water.EES 17/03/20169/03/2016 16:34:10 15:50:31 Page Page 2 2 EESEES Ver. Ver. 10.036: 10.036: #2773: #2773: 5-user 5-user license, license, ACTE ACTE s.a., s.a., Belgium Belgium EESEES Ver. Ver. 10.036: 10.036: #2773: #2773: 5-user 5-user license, license, ACTE ACTE s.a., s.a., Belgium Belgium

WaterWater side side pressure pressure drop drop [Pa] [Pa] OilWater side side pressure pressure drop drop [Pa] [Pa] 0 0 40004000 80008000 1200012000 1600016000 2000020000 00 40005000 800010000 1200015000 16000 20000 20000 25000 10 Fumes @ 300°C Fumes @ 300°C Fumes @ 300°C Fumes @ 300°C 7 7 7 FumesFumes @ @ 600°C 600°C Fumes @ 600°C 9 Fumes @ 600°C Fumes @ 450°C Fumes @ 450°C Fumes @ 450°C Fumes @ 450°C Pressure drop curve Pressure drop curve Pressure drop curve Pressure drop curve 6 6 86

7 5 5 5 /h] /h] /h] /h] 3 3 3 3 6 4 4 4 5

3 3 43 Secondary Side Secondary Side Water flow rate [m rate flow Water [m rate flow Water Water flow rate [m rate flow Water Water flow rate [m rate flow Water 3 2 2 2

2 1 1 1 1

0 0 00 0 0 500500 10001000 15001500 20002000 25002500 00 500500 10001000 15001500 2000 2000 2500 2500 3000 3 3 3 FumesFumes flow flow rate rate [Nm [Nm/h]/h] FumesFumes flow flow rate rate [Nm [Nm3/h]/h] Primary Side Primary Side The flow rates given above have been The flow rates given above have been calculated for a temperature difference of 40°C calculated for a temperature difference of 50°C (temperature range : 50-90°C) on the water side. (temperature range : 200-250°C) on the oil side. For any other temperature difference, the For any other temperature difference, the corresponding water flow rate is obtained using corresponding thermal oil flow rate is obtained the formula below. The corresponding pressure using the formula below. The corresponding drop is then determined following the initial pressure drop is then determined following the procedure. initial procedure. Power [kW] Power [kW] = Water flow rate [m³/h] = Oil flow rate [m³/h] 15.0732e6 x ∆T [°C] 6.4084e6 x ∆T [°C]

(1) Note: the grey zone corresponds to the pressure drop range for fumes from 300°C to 600°C. To read the pressure drop related to your design point on the fumes side, please consider that the higher the fumes temperature, the higher the pressure drop. When innovation Acts for savings...

Exchangers in parallel:

If the drop in pressure on the fumes is too great, it is always possible to put two exchangers in parallel, which will have the effect of dividing the fume flow rate by two. The thermal power recovered then represents twice the power given by the graph. The liquid flow rate to be taken into account is also twice that given by the graph.

For instance: for a flow rate of 6000 Nm³ per hour at 450°C, the graph indicates a pressure drop of 2840 Pa, which may be too high according to your specification. By putting two exchangers in parallel the fumes flow rate under consideration is then 3000 Nm³ per hour with the result that the pressure drop is 780 Pa.

Exchangers in line:

If the drop in pressure on the fumes, calculated from the graph, is lower than the acceptable value for your system, it is then possible to recover more heat by using a second exchanger in line with the first one. The pressure drop on the fumes is then double the initial value. In this case, please contact us for an estimate of other values.

Notes:

1. The graphs shown above give the possibility of drawing up an initial technical validation from the values of your thermal energy source. Please note that you are welcome to contact us for further technical details.

2. For any sizing where hot gas is used to reheat the air or for generating steam, please contact us directly.

ACTE-SA

Rue Gilles Magnée, 92/1 4430 Ans Belgium

Tel : +32 4 247 11 24 Fax : +32 4 247 21 87 [email protected]